power loading


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power loading

The ratio found by dividing the maximum gross weight by the brake horsepower produced by all the engines. The term is applicable to both fixed- and rotary-wing aircraft. The jet equivalent for this term is thrust loading.
References in periodicals archive ?
Twin-engine airplanes (propeller and jet) may fly under two different power loading conditions, with both engines operative and one engine inoperative (OM).
During OEI conditions, however, power loading increases significantly for twin-engine airplanes.
It also includes a practical understanding and application of relevant aerodynamic concepts like wing and power loading. Airplane performance and handling characteristics are significantly affected by the magnitudes and interrelationships of these two variables, to include but not be limited to takeoff and landing distances, climb performance, cruise airspeeds, airplane stability and Vs.
For example, when maximum takeoff performance is desired--as during a short-field takeoff--a pilot may decrease wing loading and power loading by reducing useful load.
At that weight, its maximum power loading was 4.375 per pound of thrust.
To accommodate the higher wing loading, the MU-2 has a lower power loading of 7.45 lbs/shp compared to 8.25 lbs/shp for the King Air.
Airplanes engaged in fire-fighting and parachute operations, as further examples, routinely see wide variations in wing and power loading during a single flight.
Determining your airplane's wing and power loading is a simple matter of running a couple of numbers.
For example, wing loading and power loading for a Cessna 172S NAV Ill with a wing surface area of 174 square feet, an engine generating 180 hp, and operating in the Normal Category at a maximum takeoff weight of 2550 pounds are presented in Formula 3.
Power Loading (lbs/f[t.sup.2]) = Current Weight (lbs) / Generated Horsepower (hp)
The charts on the opposite page provide examples of airplanes with different wing and power loadings.
Much of the discussion regarding wing and power loadings presumes these values remain constant.